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app/dashboard/src/utils/color.ts · v0.1.3
Source
1 a47eb4c Dawsh 2y ago export function generateDistinctColors(numColors: number) {
2 a47eb4c Dawsh 2y ago const hueStep = 360 / numColors;
3 a47eb4c Dawsh 2y ago const saturation = 90;
4 a47eb4c Dawsh 2y ago const lightness = 47;
5 a47eb4c Dawsh 2y ago const colors = [];
6 a47eb4c Dawsh 2y ago
7 a47eb4c Dawsh 2y ago for (let i = 0; i < numColors; i++) {
8 a47eb4c Dawsh 2y ago const hue = ((i * hueStep) % 360) + 140;
9 a47eb4c Dawsh 2y ago const color = hslToHex(hue, saturation, lightness);
10 a47eb4c Dawsh 2y ago colors.push(color);
11 a47eb4c Dawsh 2y ago }
12 a47eb4c Dawsh 2y ago
13 a47eb4c Dawsh 2y ago return colors;
14 a47eb4c Dawsh 2y ago }
15 a47eb4c Dawsh 2y ago
16 a47eb4c Dawsh 2y ago function hslToHex(h: number, s: number, l: number) {
17 a47eb4c Dawsh 2y ago h /= 360;
18 a47eb4c Dawsh 2y ago s /= 100;
19 a47eb4c Dawsh 2y ago l /= 100;
20 a47eb4c Dawsh 2y ago
21 a47eb4c Dawsh 2y ago let r, g, b;
22 a47eb4c Dawsh 2y ago
23 a47eb4c Dawsh 2y ago if (s === 0) {
24 a47eb4c Dawsh 2y ago r = g = b = l;
25 a47eb4c Dawsh 2y ago } else {
26 a47eb4c Dawsh 2y ago const hueToRgb = (p: number, q: number, t: number) => {
27 a47eb4c Dawsh 2y ago if (t < 0) t += 1;
28 a47eb4c Dawsh 2y ago if (t > 1) t -= 1;
29 a47eb4c Dawsh 2y ago if (t < 1 / 6) return p + (q - p) * 6 * t;
30 a47eb4c Dawsh 2y ago if (t < 1 / 2) return q;
31 a47eb4c Dawsh 2y ago if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
32 a47eb4c Dawsh 2y ago return p;
33 a47eb4c Dawsh 2y ago };
34 a47eb4c Dawsh 2y ago
35 a47eb4c Dawsh 2y ago const q = l < 0.5 ? l * (1 + s) : l + s - l * s;
36 a47eb4c Dawsh 2y ago const p = 2 * l - q;
37 a47eb4c Dawsh 2y ago
38 a47eb4c Dawsh 2y ago r = Math.round(hueToRgb(p, q, h + 1 / 3) * 255);
39 a47eb4c Dawsh 2y ago g = Math.round(hueToRgb(p, q, h) * 255);
40 a47eb4c Dawsh 2y ago b = Math.round(hueToRgb(p, q, h - 1 / 3) * 255);
41 a47eb4c Dawsh 2y ago }
42 a47eb4c Dawsh 2y ago
43 a47eb4c Dawsh 2y ago const toHex = (c: number) => {
44 a47eb4c Dawsh 2y ago const hex = c.toString(16);
45 bf7c131 Mardin 2y ago return hex.length === 1 ? '0' + hex : hex;
46 a47eb4c Dawsh 2y ago };
47 a47eb4c Dawsh 2y ago
48 a47eb4c Dawsh 2y ago return `#${toHex(r)}${toHex(g)}${toHex(b)}`;
49 a47eb4c Dawsh 2y ago }